Flickrush is a jQuery plugin designed to make it quick and easy to add your flickr photo stream to any web page with minimal effort. Fully customisable you can choose the number of photos, randomise the ordering and style to fit in with any blog or web page.
Created by Philip Beel

Instalib is a jQuery HTML5 Instagram Client Library that Allows for Instagram Authorization as well as retreiving, and posting data to a users Instagram.
This jquery plugin is a simple and extensive library in which to build Instagram plugins, components and clients with easily with Javascript/jQuery.
Created by Clemente Gomez

SPServices is a jQuery library which abstracts SharePoint’s Web Services and makes them easier to use. It also includes functions which use the various Web Service operations to provide more useful (and cool) capabilities. It works entirely client side and requires no server install.
Created by Marc Anderson

jquery simpleWeather is a helpful jQuery plugin to display the weather information for any location. The data is pulled from the public Yahoo! Weather feed via the YQL API.Customizing simpleWeather couldn’t be easier.

jRibbble is A jQuery plugin for fetching shots from the Dribbble API.It can Get a shot , the comments of a shot,the rebbbounds of a shot,a list of shots by the list name,a list of a player’s shots,a list of …

Unlimited Twitter Scroll using jQuery and twitter could be great for user experience instead of the regular pagination, where the user has to click to see the next page, unlimited scroll automatically loads the next page when the user is at the bottom by Marco Folio

Octo.js is a simple, flexible, functional JavaScript library for interacting with GitHub’s v3 API.It runs in node.js apps and the browser. It supports Basic Auth, OAuth 2, pagination and more by Justin Palmer